Unicellular is to Amoeba as multicellular is to ______.
  • (A) Bacterium
  • (B) Plant
  • (C) Virus
  • (D) Yeast
Which type of microorganisms are primarily responsible for fermentation in food preparation?
  • a) Algae
  • b) Fungi
  • c) Viruses
  • d) Bacteria
The fact that farmers grow legumes in rotation with other crops demonstrates a practical application of understanding ______.
  • (A) The process of photosynthesis
  • (B) The structure of the plant cell wall
  • (C) The life cycle of viruses
  • (D) The role of beneficial microorganisms in soil fertility
While both are microorganisms, a key difference between bacteria and algae is that algae ______.
  • (A) Are always multicellular
  • (B) Can perform photosynthesis
  • (C) Lack a cell membrane
  • (D) Are a type of virus
To see the details of an ant’s body more clearly, which simple optical tool would be most effective?
  • (A) A telescope
  • (B) A prism
  • (C) A mirror
  • (D) A magnifying glass
Spirulina and Chlorella are examples of what type of microorganism, known for being a nutrient-rich health supplement- Microalgae
  • True
  • False
All of the following are main parts of a typical animal cell EXCEPT the ______.
  • (A) Cell membrane
  • (B) Nucleus
  • (C) Cytoplasm
  • (D) Cell wall
Which gas is released during yeast fermentation that makes the dough rise?
  • (a) Oxygen
  • (b) Nitrogen
  • (c) Carbon dioxide
  • (d) Hydrogen
A group of similar cells performing a specific function is called a(n) ______.
  • (A) Organ
  • (B) Tissue
  • (C) Organism
  • (D) Organ system
A muscle cell is shaped like a ______, while a nerve cell is very long and has ______.
  • (A) Sphere, a shell
  • (B) Rectangle, a wall
  • (C) Cube, roots
  • (D) Spindle, branches
What is the main topic discussed in the section titled "The Invisible Living World: Beyond Our Naked Eye"?
  • The visible world around us
  • The invisible living world that cannot be seen with the naked eye
  • The importance of rain in nature
  • The behavior of animals in the wild
Why might observing the hidden world of tiny living beings change the way you think about what counts as 'living'?
  • Because it shows that only large animals are living
  • Because it reveals the complexity and variety of tiny living organisms
  • Because it proves that plants are not alive
  • Because it makes everything invisible
How can tiny living beings interact with each other in their environment?
  • By ignoring each other
  • By competing, cooperating, or affecting each other's survival
  • By only living alone
  • By never coming into contact
Imagine you could see the invisible living world around you. What might you use to observe these tiny living beings?
  • A telescope
  • A microscope
  • Sunglasses
  • A magnifying glass
What is the main function of a lens as described in the text?
  • To make small things look bigger
  • To make things look smaller
  • To change the color of objects
  • To make objects disappear
What scientific tool helped humans see tiny living creatures that their eyes could not?
  • Microscope
  • Telescope
  • Stethoscope
  • Thermometer
What are living beings, whether plants or animals, called according to the text?
  • Organisms
  • Minerals
  • Machines
  • Elements
What happens when you look at letters through a round-bottom flask filled with water?
  • The letters appear larger
  • The letters disappear
  • The letters change color
  • The letters become blurry
Why does a flask filled with water act like a magnifying glass?
  • Because the curved glass and water bend light, making objects appear larger
  • Because water changes the color of objects
  • Because glass absorbs light
  • Because water makes objects float
Why were people unable to see tiny organisms with their naked eyes for a long time?
  • Because tiny organisms are too small to be seen without magnification
  • Because tiny organisms are invisible
  • Because people did not have eyes
  • Because tiny organisms only appear at night
What is the purpose of using a magnifying glass to look at small organisms, as described in the activity?
  • To see the details of their bodies more clearly
  • To make them disappear
  • To change their color
  • To make them move faster
Who published the book "Micrographia" in 1665?
  • Robert Hooke
  • Antonie van Leeuwenhoek
  • Isaac Newton
  • Albert Einstein
What tool did Robert Hooke use to observe tiny things and make them look 200 to 300 times bigger?
  • Microscope
  • Telescope
  • Magnifying glass
  • Binoculars
What did Robert Hooke call each small compartment he saw in a thin slice of cork?
  • Cell
  • Atom
  • Molecule
  • Nucleus
Why is Antonie van Leeuwenhoek known as the Father of Microbiology?
  • He was the first to describe living things like bacteria and blood cells.
  • He invented the telescope.
  • He discovered gravity.
  • He wrote the first science textbook.
All living beings are made up of what basic unit?
  • Cells
  • Atoms
  • Molecules
  • Organs
Robert Hooke’s observation of cork led to the use of the word “cell” in science because he saw many small, empty spaces in cork and called each space a cell, comparing them to a honeycomb.
  • He saw atoms in cork and called them cells.
  • He saw many small, empty spaces in cork and called each space a cell, comparing them to a honeycomb.
  • He saw organs in cork and called them cells.
  • He saw molecules in cork and called them cells.
What is the purpose of adding safranin to the onion peel during the cell study activity?
  • To make the onion peel softer
  • To give a pinkish colour to the cells for better visibility
  • To dry the onion peel quickly
  • To make the onion peel thicker
Which tool is used to pull out the thin, transparent layer from the inner surface of the onion?
  • Needle
  • Brush
  • Forceps
  • Blotting paper
Why is glycerin added to the onion peel on the slide?
  • To stain the cells
  • To prevent drying and improve clarity
  • To break the cells
  • To make the peel thicker
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